Re: [PATCH v2 15/17] riscv: dts: microchip: refactor icicle kit device tree
From: Krzysztof Kozlowski
Date: Fri Dec 17 2021 - 10:04:16 EST
On 17/12/2021 10:33, conor.dooley@xxxxxxxxxxxxx wrote:
> From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>
> Assorted minor changes to the MPFS/Icicle kit device tree:
>
> - rename serial to mmuart to match microchip documentation
> - enable mmuart4 instead of mmuart0
This is not refactoring. Refactoring could include renames,
hierarchy/layout differences, naming, coding convention. You are
changing features, e.g. using different UART. Please split the changes.
> - move stdout path to serial1 to avoid collision with
> bootloader running on the e51
> - split memory node to match updated fpga design
> - move phy0 inside mac1 node to match phy configuration
> - add labels where missing (cpus, cache controller)
> - add missing address cells & interrupts to MACs
>
> Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> ---
> .../microchip/microchip-mpfs-icicle-kit.dts | 52 ++++++++------
> .../boot/dts/microchip/microchip-mpfs.dtsi | 70 ++++++++++---------
> 2 files changed, 68 insertions(+), 54 deletions(-)
>
> diff --git a/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts b/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
> index 174f977c164b..f6542ef76046 100644
> --- a/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
> +++ b/arch/riscv/boot/dts/microchip/microchip-mpfs-icicle-kit.dts
> @@ -1,5 +1,5 @@
> // SPDX-License-Identifier: (GPL-2.0 OR MIT)
> -/* Copyright (c) 2020 Microchip Technology Inc */
> +/* Copyright (c) 2020-2021 Microchip Technology Inc */
>
> /dts-v1/;
>
> @@ -13,25 +13,34 @@ / {
> compatible = "microchip,mpfs-icicle-kit", "microchip,mpfs";
>
> aliases {
> - ethernet0 = &emac1;
> - serial0 = &serial0;
> - serial1 = &serial1;
> - serial2 = &serial2;
> - serial3 = &serial3;
> + ethernet0 = &mac1;
> + serial0 = &mmuart0;
> + serial1 = &mmuart1;
> + serial2 = &mmuart2;
> + serial3 = &mmuart3;
> + serial4 = &mmuart4;
> };
>
> chosen {
> - stdout-path = "serial0:115200n8";
> + stdout-path = "serial1:115200n8";
> };
>
> cpus {
> timebase-frequency = <RTCCLK_FREQ>;
> };
>
> - memory@80000000 {
> + ddrc_cache_lo: memory@80000000 {
> device_type = "memory";
> - reg = <0x0 0x80000000 0x0 0x40000000>;
> + reg = <0x0 0x80000000 0x0 0x2e000000>;
> clocks = <&clkcfg CLK_DDRC>;
> + status = "okay";
> + };
> +
> + ddrc_cache_hi: memory@1000000000 {
This looks unrelated to refactoring - split of memory - and needs
separate change.
> + device_type = "memory";
> + reg = <0x10 0x0 0x0 0x40000000>;
> + clocks = <&clkcfg CLK_DDRC>;
> + status = "okay";
> };
> };
>
> @@ -39,19 +48,19 @@ &refclk {
> clock-frequency = <600000000>;
> };
>
> -&serial0 {
> +&mmuart1 {
> status = "okay";
> };
>
> -&serial1 {
> +&mmuart2 {
> status = "okay";
> };
>
> -&serial2 {
> +&mmuart3 {
> status = "okay";
> };
>
> -&serial3 {
> +&mmuart4 {
> status = "okay";
> };
>
> @@ -61,29 +70,32 @@ &mmc {
> bus-width = <4>;
> disable-wp;
> cap-sd-highspeed;
> + cap-mmc-highspeed;
> card-detect-delay = <200>;
> + mmc-ddr-1_8v;
> + mmc-hs200-1_8v;
This looks unrelated to refactoring - new modes for MMC - and needs
separate change.
> sd-uhs-sdr12;
> sd-uhs-sdr25;
> sd-uhs-sdr50;
> sd-uhs-sdr104;
> };
>
> -&emac0 {
> +&mac0 {
> phy-mode = "sgmii";
> phy-handle = <&phy0>;
> - phy0: ethernet-phy@8 {
> - reg = <8>;
> - ti,fifo-depth = <0x01>;
> - };
> };
>
> -&emac1 {
> +&mac1 {
> status = "okay";
> phy-mode = "sgmii";
> phy-handle = <&phy1>;
> phy1: ethernet-phy@9 {
> reg = <9>;
> - ti,fifo-depth = <0x01>;
> + ti,fifo-depth = <0x1>;
> + };
> + phy0: ethernet-phy@8 {
> + reg = <8>;
> + ti,fifo-depth = <0x1>;
> };
> };
>
> diff --git a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
> index 808500be26c3..d311c5ea27c9 100644
> --- a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
> +++ b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
> @@ -1,5 +1,5 @@
> // SPDX-License-Identifier: (GPL-2.0 OR MIT)
> -/* Copyright (c) 2020 Microchip Technology Inc */
> +/* Copyright (c) 2020-2021 Microchip Technology Inc */
>
> /dts-v1/;
> #include "dt-bindings/clock/microchip,mpfs-clock.h"
> @@ -16,7 +16,7 @@ cpus {
> #address-cells = <1>;
> #size-cells = <0>;
>
> - cpu@0 {
> + cpu0: cpu@0 {
> compatible = "sifive,e51", "sifive,rocket0", "riscv";
> device_type = "cpu";
> i-cache-block-size = <64>;
> @@ -34,7 +34,7 @@ cpu0_intc: interrupt-controller {
> };
> };
>
> - cpu@1 {
> + cpu1: cpu@1 {
> compatible = "sifive,u54-mc", "sifive,rocket0", "riscv";
> d-cache-block-size = <64>;
> d-cache-sets = <64>;
> @@ -61,7 +61,7 @@ cpu1_intc: interrupt-controller {
> };
> };
>
> - cpu@2 {
> + cpu2: cpu@2 {
> compatible = "sifive,u54-mc", "sifive,rocket0", "riscv";
> d-cache-block-size = <64>;
> d-cache-sets = <64>;
> @@ -88,7 +88,7 @@ cpu2_intc: interrupt-controller {
> };
> };
>
> - cpu@3 {
> + cpu3: cpu@3 {
> compatible = "sifive,u54-mc", "sifive,rocket0", "riscv";
> d-cache-block-size = <64>;
> d-cache-sets = <64>;
> @@ -115,7 +115,7 @@ cpu3_intc: interrupt-controller {
> };
> };
>
> - cpu@4 {
> + cpu4: cpu@4 {
> compatible = "sifive,u54-mc", "sifive,rocket0", "riscv";
> d-cache-block-size = <64>;
> d-cache-sets = <64>;
> @@ -153,8 +153,9 @@ soc {
> compatible = "simple-bus";
> ranges;
>
> - cache-controller@2010000 {
> + cctrllr: cache-controller@2010000 {
> compatible = "sifive,fu540-c000-ccache", "cache";
> + reg = <0x0 0x2010000 0x0 0x1000>;
> cache-block-size = <64>;
> cache-level = <2>;
> cache-sets = <1024>;
> @@ -162,10 +163,9 @@ cache-controller@2010000 {
> cache-unified;
> interrupt-parent = <&plic>;
> interrupts = <1>, <2>, <3>;
> - reg = <0x0 0x2010000 0x0 0x1000>;
> };
>
> - clint@2000000 {
> + clint: clint@2000000 {
> compatible = "sifive,fu540-c000-clint", "sifive,clint0";
> reg = <0x0 0x2000000 0x0 0xC000>;
> interrupts-extended = <&cpu0_intc HART_INT_M_SOFT>,
> @@ -198,15 +198,6 @@ plic: interrupt-controller@c000000 {
> riscv,ndev = <186>;
> };
>
> - dma@3000000 {
> - compatible = "sifive,fu540-c000-pdma";
Removal of nodes does not look like refactoring.
> - reg = <0x0 0x3000000 0x0 0x8000>;
> - interrupt-parent = <&plic>;
> - interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>,
> - <30>;
> - #dma-cells = <1>;
> - };
> -
Best regards,
Krzysztof